I ride mine nearly every day that it's not raining, Aprilish until early November. I usually get around 5000 miles in a year. It's a Tomos A55 and has been pretty reliable. It was new in 2008. Aside from flat tires, I've only broken down twice. The first time it just about a mile from home. I pushed it home and found out the problem was the spark plug wire. I pushed the ends firmly into the sockets and it's been fine ever since. The second time, a little piece of metal broke on one of the clutch segments, where the pin goes, and the 1st gear clutch would not release at idle. I have not yet needed to change piston rings. Great reliability and service life for a little 50cc engine!